Revert "Symlink external/bazelbuild-rules_go in mock tests"

Revert submission 2626204-rules_go_repo

Reason for revert: breaks the aosp_kernel-build-tools (https://ci.android.com/builds/branches/aosp_kernel-build-tools/grid)
Reverted changes: /q/submissionid:2626204-rules_go_repo

Change-Id: I1c816bdb739e08794da4affb6fca3b3a052ed355
diff --git a/tests/lib.sh b/tests/lib.sh
index 4aaf272..b5dea99 100644
--- a/tests/lib.sh
+++ b/tests/lib.sh
@@ -144,7 +144,6 @@
   symlink_directory prebuilts/jdk
   symlink_directory external/bazel-skylib
   symlink_directory external/bazelbuild-rules_android
-  symlink_directory external/bazelbuild-rules_go
   symlink_directory external/bazelbuild-rules_license
   symlink_directory external/bazelbuild-kotlin-rules